Embossing-machine



(No Model.)

LV. B. HOWE. EMBOSSING MACHINE. No. 591,473. Patented Oct. 12,1897.

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Witnesses. Inventor.

911N513. Nam, )jw v Attorneys.

UNITED STATES PATENT .FFICE.

M RTIN V. B. HOWE, OF GARDNER, MASSACHUSETTS.

EMBOSSlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 591,473, dated October 12, 1897. Application filed January 14, 1897. $erla1N o. 619,183 (No model.)

strong, simple, and efficient means for holding segmental annular embossing-dies and to provide means for normally bringing the leading edge of the embossing-die into position to engage the Work.

To these ends my invention consists of theparts and combinations of parts, as hereinafter described, and more particularly pointed out in the claims at the end of this specification. I

In the accompanying drawings, Figure 1 is a side view of sufiicient parts of my embossing-machine to illustrate the application of my invention thereto. Fig. 2 is an end View of the same. vFig. 3 is a sectional View taken on the line 3 3 of Fig. 2, looking in the direction indicated by the arrows. Figs. 4 to 6, inclusive, are views illustrating the manner in which an embossing-die may be removed from its chuck; and Fig. 7 is a view illus'trat-- ing a slightly-modified formof die.

The embossing-diesheretofore ordinarily employed in embossing machines of that character to which my invention relates have consisted of annular or cylindrical shells having the design engraved on the surface thereof. 7 V

I have found in practice that the use of complete cylindrical embossing-dies is obj ectionable, as when one of said dies has been mounted in a machine it is difficult to change or replace it. A

In wood-embossing machines the dies are heated by means of gas-flames or-otherwise, and where complete cylindrical dies are employed it is necessarythat one bearing of the arbor or shaft carrying the die should be removed and the .die slipped endwise off from its arbor. tion and requires considerable handling of the heated die. Further, the designs em- This is necessarily a slow opera l ployed in embossing-machines are of diifere'nt lengths, and where any particular design is not long enough to extend around or include the entireperiphery of ac'ylinder that part of the cylinder which isnot included in the design will be superfluous.

' The especial aim of my invention is therefore to provide segmental annular embossing-dies in which the design occupies the entire surface, to provide an improved chuck by means of which the dies may be readily and quickly mounted upon or removed from the arbor of the machine, and to provide an adjustable stop and retractile for normally holding the leading edge of the die in position to engage the work.

Referring to the drawings and in detaihlO designates the main shaft or arbor of an embossing-machine, which is made hollow in order to allow for the introduction of gas-jets or other suitable heating devices for keeping the embossing-die hot.

As shown by dotted lines in Fig. 2, the work may be mounted on a vertically-movable reciprocating table 27, which may be moved up to bring the work into engagement with the embossing-die and reciprocate backward or forward in the ordinary manner.

Loosely mounted on the shaft or arbor 1O are two axially-movable segmental'sections 11 and 12. The sections 11 and 12 are connected by bolts 16, the position of said bolts being indicated by dotted lines in Fig. 2. Threaded onto the bolt 16 are clampingnuts 17.

The axially-movable segmental sections 11 and 12 are shaped on their inner faces to engage the dovetailed securing-tongue 18, which is carried'by and formed integrally with the segmental annular embossing-die 15. Threaded into the sections 11 and 1.2 are screws 19, which form stops for the tail edge of theembossing-die 15.

The manner in which an embossing-die can be fitted onto or removed from a chuck constructed according to my invention is. most clearly illustrated in Figs. 4 to 6.

When the clampingnuts 17 have been loosened, the embossing-die 15 can be turned freely upon the chuck until brought into the position illustrated in Fig. 5. In this position the slabbed-oif or cut-away portion of the sections 11 and 12 will allow the embossing-die 15 to be moved laterally off from the chuck. It will thus be seen that I have provided an extremely simple and efficient chuck or holding device for my segmental embossing-dies. This same form of securing device is also applicable wherever it is desired to secure a segmental plate upon the surface of a cylinder. For example, clamping devices of this character might be employed in rotary printingpresses for securing stereotype-plates upon the surface of a printing-cylinder.

The clamping devices or chucks are secured in place upon the shaft or arbor of the machine by means of the ordinary retainingcollars 13 and let, which are fastened upon the shaft 10 by set-screws in the ordinary manner.

Extending from the section 12 is a pin or projection 20. Cooperating with the pin or projection 20 is an adjustable stop 21, Which is carried by a ring which may be adjustably secured to a stationary boss or projection on the frame of the embossing-machine. A cord 23 is wound or mounted in a groove 26 of the section 12 and is connected at its ends to any suitable retractile. For example, in Fig. 1 the cord 23 is illustrated as connected to a weight 21, and in Fig. 2 the cord 23 is illustrated as connected to .a spiral spring 25. The weight 24 or the spring 25, as the case may be, is arranged to normally hold the pin or projection 20 in engagement with the adjustable stop 21. The adjustable stop 21 is set or adj usted so that the leading edge of the segmental annularembossing-dieis normally brought substantially under the center of the axle or shaft 10 or in position to engage the work.

In Fig. 7 I have illustrated a slightly-modified form of construction. In this figure the die is shown as provided with perforated guides 26, arranged to engage the clampingbolts 16. This construction is especially designed for use with dies which are made of very thin material, so as to more strongly hold said dies and prevent the same from stretching While in use. At its tail end the die 15 in this figure is illustrated as beveled at 27 to cooperate with a corresponding dovetailed strip 28, which may be used in place of the screws 19, before described, in order to more firmly hold the die in place.

I am aware that changes may be made in embossirig-machines by those who are skilled in the art without departing from the scope of my invention as expressed in the claims and that parts of my invention may be used in different relations and in different combinations. I do not wish, therefore, to be limited to the forms which I have shown and described; but

That I do claim, and desire to secure by Letters Patent of the United States, is

1. As an article of manufacture, a chuck for segmental embossing-dies or similar plates, comprising slabbed or cut-away axially-movable clamping-sections and bolts adjustably connecting said clamping-sections, said parts being arranged so that a plate may be secured upon the surface of the chuck by tightening the bolts to bring the clamping-sections into engagement with a securing rib or projection of said plate, and so that a plate occupying more than half the circumference of the chuck may be rotated thereon and taken laterally off from the chuck without removing the bearings thereof, substantially as described.

2. The combination of a hollow shaft or arbor 10, slabbed or cut-away clamping-sections 11 and 12 loosely mounted on said arbor, retaining-collars 13 and 14 for holding said chuck in place on the arbor, and an embossing-die 15 fitting onto more than half the surface of said chuck, and having a dovetailed rib or projection 18 shaped to engage corresponding surfaces on the clamping-sections, said parts being arranged so that the die can be rotated on the chuck, and taken laterally therefrom, substantially as described.

3. The combination of an embossing-die 15, a loosely-mounted chuck, a stop 20 carried by said chuck, a ring, means for adjustably clamping said ring in different positions on the frame of an embossing-machine, a stop extending from said ring in position to engage the projection 20, a cord 23 mounted in a groove 26in the chuck, and a retractile connected to said cord, the parts being arranged to successfully hold the wedging end of the embossing-die in position to engage the work, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

MARTIN V. B. HOWE. \Vitnesses:

FLORNS D. RAMSDELL, ANNE MORIARTY. 

